8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000000 [00000000] *pgd=84d38003, *pmd=fe7cd003 Internal error: Oops: 207 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 30984 Comm: syz-executor.1 Not tainted 6.1.0-rc4-syzkaller #0 Hardware name: ARM-Versatile Express PC is at __queue_work+0xa0/0x74c kernel/workqueue.c:1459 LR is at 0x82c00000 pc : [<80260410>] lr : [<82c00000>] psr: 60000193 sp : ed489ac8 ip : 82c00024 fp : ed489b0c r10: 8280e800 r9 : 00000000 r8 : 82449498 r7 : 8220c940 r6 : 00000008 r5 : 85913200 r4 : 84ff585c r3 : 00000000 r2 : 00000000 r1 : 00000004 r0 : 8280e800 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 8504f1c0 DAC: fffffffd Register r0 information: slab kmalloc-512 start 8280e800 pointer offset 0 size 512 Register r1 information: non-paged memory Register r2 information: NULL pointer Register r3 information: NULL pointer Register r4 information: slab kmalloc-2k start 84ff5800 pointer offset 92 size 2048 Register r5 information: slab kmalloc-512 start 85913200 pointer offset 0 size 512 Register r6 information: non-paged memory Register r7 information: non-slab/vmalloc memory Register r8 information: non-slab/vmalloc memory Register r9 information: NULL pointer Register r10 information: slab kmalloc-512 start 8280e800 pointer offset 0 size 512 Register r11 information: 2-page vmalloc region starting at 0xed488000 allocated at kernel_clone+0x9c/0x3f4 kernel/fork.c:2671 Register r12 information: slab radix_tree_node start 82c00000 pointer offset 36 Process syz-executor.1 (pid: 30984, stack limit = 0xed488000) Stack: (0xed489ac8 to 0xed48a000) 9ac0: 80275518 802a0f18 820a235c 849d2e00 0000001b 00000000 9ae0: 80000113 84ff585c 00000008 85913200 60000113 ed489b63 8250f9c0 84f4a974 9b00: ed489b2c ed489b10 80260b0c 8026037c 8419f9c0 84ff5800 00000000 00000001 9b20: ed489b5c ed489b30 816cb278 80260ac8 8167bbd0 ed489bbc ed489ba8 84ff5800 9b40: 84ff58d8 000001f4 816cb2f8 00000000 ed489b74 ed489b60 816cb32c 816cb1d4 9b60: 01275518 49937187 ed489b94 ed489b78 816c9eb8 816cb304 84ff5800 81ed8f0c 9b80: 84ff5818 84ff58c4 ed489bbc ed489b98 816ca530 816c9e90 ed489bbc 49937187 9ba0: 84f4a400 81ed8f0c 84f4a45c 858dfc80 ed489bdc ed489bc0 816be830 816ca424 9bc0: 84f4a400 81ed8f0c 841d6f00 858dfc80 ed489bf4 ed489be0 816bfe24 816be7c8 9be0: 84f6d814 81ed8f0c ed489c9c ed489bf8 813b6a80 816bfe00 00000001 824484f8 9c00: ed489c1c ed489c10 817582ac 81758198 ed489c4c ed489c20 8027ae00 802745b4 9c20: ed489c4c ed489c30 8020c314 8020d440 816bfdf4 00000000 00000000 00000000 9c40: 81a4d3a0 0000001f 03010002 00000000 000010e6 84f6d800 84f6d810 84f6d814 9c60: 858dfc80 8250f9c0 00000000 00000000 ed489ca4 49937187 841d6f00 813b68b8 9c80: 84f6d800 0000001c 82210b94 00000000 ed489cec ed489ca0 813b5b6c 813b68c4 9ca0: 82801480 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9cc0: 00000000 00000000 00000000 49937187 841d6f00 823bfe4c 84f4a800 841d6f00 9ce0: ed489d04 ed489cf0 813b63dc 813b5ab4 82930000 82930064 ed489d44 ed489d08 9d00: 813b50a8 813b63bc 84f4a800 0000001c 7fffffff 49937187 ed489d44 0000001c 9d20: ed489f38 841d6f00 0000001c 84f4a800 00000000 00000000 ed489da4 ed489d48 9d40: 813b53f0 813b4e60 00000000 00000000 84f6d800 00000000 00000000 85344d00 9d60: 00000000 000010e6 00000000 00000000 00000000 49937187 ed489da4 ed489f38 9d80: 846c4280 846c4280 00000000 00000000 00000000 ed489ddc ed489dbc ed489da8 9da0: 8128ff6c 813b51e8 ed489f38 00000000 ed489e2c ed489dc0 81290d50 8128ff3c 9dc0: 80795b6c 807959e8 ed489e38 ed489f48 00000000 00000000 ed489e2c ed489de8 9de0: 8129295c 80795b4c ed489e38 ed489f48 00000000 00000000 20000180 49937187 9e00: 00000000 00000000 ed489f38 846c4280 00000000 00000000 849d2e00 00000128 9e20: ed489f24 ed489e30 81292a04 81290b50 00000000 8175a274 00000000 200001c0 9e40: 0000001c 849d2e00 ed489f24 ed489e58 80300518 802fc984 ed489e6c 00000000 9e60: ed489f68 849d2e00 849d2e00 828fb240 ed489ea4 ed489e80 80682a80 804faab4 9e80: 00000000 ed489ee0 ed489ed4 ed489e98 802fbfd8 80811368 ed489ed4 ed489ea8 9ea0: 80b69afc 49937187 00000064 ed489eac ed489ef4 ed489ec0 802fab54 810b235c 9ec0: ed489efc ed489ed0 804cbfe8 802ce8a8 00000000 ed489f34 ed489f30 00000000 9ee0: 00000128 80200288 849d2e00 00000128 ed489f0c ed489f00 804cc05c 49937187 9f00: ed489f24 846c4280 20000140 00000000 00000128 80200288 ed489fa4 ed489f28 9f20: 81292e58 8129299c 00000000 00000000 00000001 fffffff7 00000000 00000000 9f40: ed489f5c ed489f50 01010000 00000000 00000000 ed489e44 00000000 00000000 9f60: 00000000 00000001 00000000 00000000 00000000 00000000 ed489f9c ed489f88 9f80: 803ecf68 49937187 00000000 00000000 00000000 0014c2c0 00000000 ed489fa8 9fa0: 80200060 81292e0c 00000000 00000000 00000007 20000140 00000000 00000000 9fc0: 00000000 00000000 0014c2c0 00000128 7eeb73d2 76a766d0 7eeb7544 76a7620c 9fe0: 76a76020 76a76010 000164dc 0004d5a0 60000010 00000007 00000000 00000000 Backtrace: [<80260370>] (__queue_work) from [<80260b0c>] (queue_work_on+0x50/0x5c kernel/workqueue.c:1545) r10:84f4a974 r9:8250f9c0 r8:ed489b63 r7:60000113 r6:85913200 r5:00000008 r4:84ff585c [<80260abc>] (queue_work_on) from [<816cb278>] (queue_work include/linux/workqueue.h:503 [inline]) [<80260abc>] (queue_work_on) from [<816cb278>] (nci_send_cmd+0xb0/0x110 net/nfc/nci/core.c:1376) r7:00000001 r6:00000000 r5:84ff5800 r4:8419f9c0 [<816cb1c8>] (nci_send_cmd) from [<816cb32c>] (nci_reset_req+0x34/0x5c net/nfc/nci/core.c:166) r8:00000000 r7:816cb2f8 r6:000001f4 r5:84ff58d8 r4:84ff5800 [<816cb2f8>] (nci_reset_req) from [<816c9eb8>] (__nci_request+0x34/0xd8 net/nfc/nci/core.c:107) [<816c9e84>] (__nci_request) from [<816ca530>] (nci_open_device net/nfc/nci/core.c:502 [inline]) [<816c9e84>] (__nci_request) from [<816ca530>] (nci_dev_up+0x118/0x1f8 net/nfc/nci/core.c:631) r7:84ff58c4 r6:84ff5818 r5:81ed8f0c r4:84ff5800 [<816ca418>] (nci_dev_up) from [<816be830>] (nfc_dev_up+0x74/0x11c net/nfc/core.c:118) r7:858dfc80 r6:84f4a45c r5:81ed8f0c r4:84f4a400 [<816be7bc>] (nfc_dev_up) from [<816bfe24>] (nfc_genl_dev_up+0x30/0x58 net/nfc/netlink.c:770) r7:858dfc80 r6:841d6f00 r5:81ed8f0c r4:84f4a400 [<816bfdf4>] (nfc_genl_dev_up) from [<813b6a80>] (genl_family_rcv_msg_doit net/netlink/genetlink.c:756 [inline]) [<816bfdf4>] (nfc_genl_dev_up) from [<813b6a80>] (genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]) [<816bfdf4>] (nfc_genl_dev_up) from [<813b6a80>] (genl_rcv_msg+0x1c8/0x3f4 net/netlink/genetlink.c:850) r5:81ed8f0c r4:84f6d814 [<813b68b8>] (genl_rcv_msg) from [<813b5b6c>] (netlink_rcv_skb+0xc4/0x128 net/netlink/af_netlink.c:2540) r9:00000000 r8:82210b94 r7:0000001c r6:84f6d800 r5:813b68b8 r4:841d6f00 [<813b5aa8>] (netlink_rcv_skb) from [<813b63dc>] (genl_rcv+0x2c/0x3c net/netlink/genetlink.c:861) r7:841d6f00 r6:84f4a800 r5:823bfe4c r4:841d6f00 [<813b63b0>] (genl_rcv) from [<813b50a8>] (netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]) [<813b63b0>] (genl_rcv) from [<813b50a8>] (netlink_unicast+0x254/0x388 net/netlink/af_netlink.c:1345) r5:82930064 r4:82930000 [<813b4e54>] (netlink_unicast) from [<813b53f0>] (netlink_sendmsg+0x214/0x4a8 net/netlink/af_netlink.c:1921) r10:00000000 r9:00000000 r8:84f4a800 r7:0000001c r6:841d6f00 r5:ed489f38 r4:0000001c [<813b51dc>] (netlink_sendmsg) from [<8128ff6c>] (sock_sendmsg_nosec net/socket.c:714 [inline]) [<813b51dc>] (netlink_sendmsg) from [<8128ff6c>] (sock_sendmsg+0x3c/0x4c net/socket.c:734) r10:ed489ddc r9:00000000 r8:00000000 r7:00000000 r6:846c4280 r5:846c4280 r4:ed489f38 [<8128ff30>] (sock_sendmsg) from [<81290d50>] (____sys_sendmsg+0x20c/0x2a4 net/socket.c:2482) r5:00000000 r4:ed489f38 [<81290b44>] (____sys_sendmsg) from [<81292a04>] (___sys_sendmsg+0x74/0xac net/socket.c:2536) r10:00000128 r9:849d2e00 r8:00000000 r7:00000000 r6:846c4280 r5:ed489f38 r4:00000000 [<81292990>] (___sys_sendmsg) from [<81292e58>] (__sys_sendmsg net/socket.c:2565 [inline]) [<81292990>] (___sys_sendmsg) from [<81292e58>] (__do_sys_sendmsg net/socket.c:2574 [inline]) [<81292990>] (___sys_sendmsg) from [<81292e58>] (sys_sendmsg+0x58/0xa0 net/socket.c:2572) r8:80200288 r7:00000128 r6:00000000 r5:20000140 r4:846c4280 [<81292e00>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:64) Exception stack(0xed489fa8 to 0xed489ff0) 9fa0: 00000000 00000000 00000007 20000140 00000000 00000000 9fc0: 00000000 00000000 0014c2c0 00000128 7eeb73d2 76a766d0 7eeb7544 76a7620c 9fe0: 76a76020 76a76010 000164dc 0004d5a0 r6:0014c2c0 r5:00000000 r4:00000000 Code: 0a00003b e59f06a8 eb52dc03 e1a0a000 (e5990000) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 0a00003b beq 0xf4 4: e59f06a8 ldr r0, [pc, #1704] ; 0x6b4 8: eb52dc03 bl 0x14b701c c: e1a0a000 mov sl, r0 * 10: e5990000 ldr r0, [r9] <-- trapping instruction